Download Mitsubishi Heavy Industries SRK52CF-BN Specifications
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Manual No. ’06 . SRK-T . 062 TECHNICAL MANUAL Collection data WALL MOUNTED TYPE ROOM AIR-CONDITIONER (Split system, air cooled cooling only type) SRK52CF-BN, 71CF-BN SRK52CF-BP, 71CF-BP - 3- CONTENTS 1. GENERAL INFORMATION .............................................................................. 1 1.1 Specific features ....................................................................................... 1 1.2 How to read the model name ................................................................... 1 2. SELECTION DATA .......................................................................................... 2 2.1 Specifications ........................................................................................... 2 2.2 Range of usage & limitations .................................................................. 6 2.3 Exterior dimensions ................................................................................. 6 2.4 Piping system ........................................................................................... 8 2.5 Selection chart .......................................................................................... 9 3. ELECTRICAL DATA ........................................................................................ 10 3.1 Electrical wiring ........................................................................................ 10 4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ................... 14 4.1 Operation control function by remote control switch ........................... 14 4.2 Unit ON/OFF button .................................................................................. 16 4.3 Power blackout auto restart function ..................................................... 16 4.4 Custom cord switching procedure ......................................................... 17 4.5 Flap and louver control ............................................................................ 17 4.6 Comfortable timer setting ........................................................................ 18 4.7 Sleep timer operation ............................................................................... 18 4.8 Outline of cooling operation .................................................................... 19 4.9 Outline of dehumidifying operation ........................................................ 20 4.10 Outline of automatic operation ................................................................ 21 4.11 Set temperature selection ........................................................................ 21 4.12 Outline of fan operation ........................................................................... 22 4.13 Regulation of outdoor air flow ................................................................. 22 4.14 Stop mode ................................................................................................. 23 4.15 External control (remote display)/control of input signal ..................... 24 4.16 Operation permission/prohibition control .............................................. 25 4.17 Protective control function ...................................................................... 25 4.18 List of indoor unit jumper selections ...................................................... 28 5. APPLICATION DATA ....................................................................................... 29 5.1 Selection of location for installation ....................................................... 30 5.2 Installation of indoor unit ......................................................................... 31 5.3 Installation of outdoor unit ...................................................................... 34 5.4 Refrigerant piping ..................................................................................... 34 5.5 Test run ...................................................................................................... 36 5.6 Precautions for wireless remote control installation and operation ........ 36 5.7 Installation of wired remote control and super link adapter (SC-AD-ER) (Optional parts) ...................................................... 37 6. MAINTENANCE DATA .................................................................................... 44 6.1 Troubleshooting procedures for electrical equipment ......................... 44 6.2 Servicing .................................................................................................... 52 - 1- 1 GENERAL INFORMATION 1.1 Specific features The “MITSUBISHI HEAVY INDUSTRIES, LTD.” room air-conditioner: SRK series are of split and wall mounted type and the unit consists of indoor unit and outdoor unit with refrigerant precharged in factory. The indoor unit is composed of room air cooling equipment with operation control switch and the outdoor unit is composed of condensing unit with compressor. (1) Remote control flap & louver The flap & louver can be automatically controlled by operating wireless remote control. ¡ Flap swing : The flaps swing up and down successively. ¡ Louver swing : The louvers swing left and right successively. ¡ Multi-directional Air Flow : Activating both up/down air swing and left/right air swing at the same time results in a multi(up/down air scroll and directional air flow. left/right air scroll) ¡ Memory flap : Once the flap & louver position is set, the unit memorizes the position and continues to operate at the same position from the next time. (2) Automatic operation When the remote control switch is set on “auto ( ) ”, it will either automatically decide operation mode such as cooling and thermal dry, or operate in the operation mode before it has been turned to automatic control. (3) Self diagnosis function ¡ We are constantly trying to do better service to our customers by installing such judges that show abnormality of operation as follows. RUN light 1 time flash TIMER light ON 2 time flash 6 time flash TIMER light Heat exchanger sensor error Room temperature sensor error RUN light keeps flashing Indoor fan motor error RUN light ON 1 time flash Outdoor temperature sensor error 2 time flash Outdoor heat exchanger sensor error 4 time flash Discharge pipe temp. sensor error 2 time flash Trouble of outdoor unit 5 time flash Over heat of compressor 6 time flash Error of signal transmission 1.2 How to read the model name Example : SR K 52 C F - BN Power supply BN: 1 Phase 220-240V 50Hz BP: 1 Phase 220V 60Hz Series No. Cooling only type Product capacity Wall mounted type Split type room air-conditioner - 1- 2. SELECTION DATA 2.1 Specifications Model SRK52CF-BN (Indoor unit) SRC52CF-BN (Outdoor unit) (220/240V) Model SRK52CF-BN Item kW ISO-T1 (JIS) Cooling capacity ISO-T3 (SASO) Cooling power input Energy efficiency ratio Rating current Cooling capacity Cooling power input Energy efficiency ratio Rating current Power source Noise level Cooling Sound level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Refrigerant piping Motor Starting method Heat exchanger Refrigerant control Refrigerant(3) Refrigerant oil Deice control Air handling equipment Fan type & Q’ty Motor Air flow (at High) Air filter, Q’ty Shock & vibration absorber Electric heater Operation control Operation switch Room temperature control Pilot lamp Safety equipment 5.4 / 5.4 kW Btu/hW A kW kW Btu/hW A 1.76 / 1.91 10.47 / 9.66 8.8 / 8.7 5.0 / 5.0 2.06 / 2.20 8.29 / 7.75 10.3 / 10.1 1 Phase, 220-240V, 50Hz Hi 43, Me 40, Lo 37 dB 318 × 1098 × 248 640 × 850 × 290 kg Yellowish white 15 Stucco white 46 – 2KS314D5AB04 (Rotary type) × 1 – 1.5 – Line starting Slit fins & inner grooved tubing Straight fin & inner grooved tubing Capillary tubes + Electric expansion valve R22 1.25 (Pre-Charged up to the piping length of 7m) 0.67 (ATMOS NM56M or SUNISO 4DGID) Microcomputer control kg R W (Cooling) 49 mm kW CMM Tangential fan × 1 Propeller fan × 1 46 20 Polypropylene net (washable) × 2 – – 35 38 – Cushion rubber (for compressor) – Wireless-Remote control – Microcomputer thermostat – RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange) Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error protection O.D Connecting method Attached length of piping Liquid line: φ6.35 (1/4″) Gas line: φ15.88 (5/8″) Flare connecting Liquid line: 0.70m – Gas line: 0.63m Necessary (Both sides) Connectable Terminal block (Screw fixing type) 1.5 mm2 × 4 cores (Including earth cable) Terminal block (Screw fixing type) mm (in) Insulation Drain hose Power source supply Connection wiring SRC52CF-BN Size × Core number Connecting method Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1) Wired-Remote control Accessories (included) Optional parts Notes (1) The data are measured at the following conditions. Item Operation Cooling Indoor air temperature Outdoor air temperature DB WB DB WB 27ºC 29ºC 19ºC 19ºC 35ºC 46ºC 24ºC 24ºC The piping length is 7.5m. (2) The operation data are applied to the 220/240V districts respectively. (3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.) If the piping length is longer, when it is 7 to 25m, add 25g refrigerant per meter. - 2- Standards ISO-T1, JIS C9612 ISO-T3, SASO 385/386 Model SRK71CF-BN (Indoor unit) SRC71CF-BN (Outdoor unit) (220/240V) Model SRK71CF-BN Item ISO-T3 (SASO) ISO-T1 (JIS) Cooling capacity Cooling power input Energy efficiency ratio Rating current Cooling capacity Cooling power input Energy efficiency ratio Rating current Power source Noise level Cooling Sound level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refrigerant control Refrigerant piping Refrigerant(3) Refrigerant oil Deice control Air handling equipment Fan type & Q’ty Motor Air flow (at High) Air filter, Q’ty Shock & vibration absorber Electric heater Operation control Operation switch Room temperature control Pilot lamp Safety equipment kW kW Btu/hW A kW kW Btu/hW A 7.03 / 7.03 2.12 / 2.27 11.33 / 10.58 10.6 / 10.4 6.3 / 6.3 2.48 / 2.60 8.67 / 8.26 12.4 / 11.9 1 Phase, 220-240V, 50Hz Hi 45, Me 42, Lo 39 dB 318 × 1098 × 248 750 × 880 × 340 kg Yellowish white 15 Stucco white 67 – 2JS386D5BC02 (Rotary type) × 1 kW – 1.8 – Line starting Slit fins & inner grooved tubing Straight fin & inner grooved tubing Capillary tubes + Electric expansion valve R22 1.75 (Pre-charged up to the piping length of 7m) 0.7 (ATMOS NM56M or SUNISO 4GDID) Microcomputer control W CMM Tangential fan × 1 Propeller fan × 1 46 20.5 Polypropylene net (washable) × 2 – – 85 60 – Cushion rubber (for compressor) – Wireless-Remote control – Microcomputer thermostat – RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange) Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error protection O.D Connecting method Attached length of piping Liquid line: φ6.35 (1/4″) Gas line: φ15.88 (5/8″) Flare connecting Liquid line: 0.70m – Gas line : 0.63m Necessary (Both sides) Connectable Terminal block (Screw fixing type) 1.5 mm2 × 4 cores (Including earth cable) Terminal block (Screw fixing type) mm (in) Insulation Drain hose Power source supply Connection wiring 55 mm kg R (Cooling) SRC71CF-BN Size × Core number Connecting method Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1) Wired-Remote control Accessories (included) Optional parts Notes (1) The data are measured at the following conditions. Item Operation Cooling Indoor air temperature Outdoor air temperature DB WB DB WB 27ºC 29ºC 19ºC 19ºC 35ºC 46ºC 24ºC 24ºC The piping length is 7.5m. (2) The operation data are applied to the 220/240V districts respectively. (3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.) If the piping length is longer, when it is 7 to 25m, add 25g refrigerant per meter. - 3- Standards ISO-T1, JIS C9612 ISO-T3, SASO 385/386 Model SRK52CF-BP (Indoor unit) SRC52CF-BP (Outdoor unit) (220V) Model SRK52CF-BP Item ISO-T1 (JIS) Cooling capacity ISO-T3 (SASO) Cooling power input Energy efficiency ratio Rating current Cooling capacity Cooling power input Energy efficiency ratio Rating current Power source Noise level Cooling Sound level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refrigerant control Refrigerant piping Refrigerant(3) Refrigerant oil Deice control Air handling equipment Fan type & Q’ty Motor Air flow (at High) Air filter, Q’ty Shock & vibration absorber Electric heater Operation control Operation switch Room temperature control Pilot lamp Safety equipment kW 5.4 kW Btu/hW A kW kW Btu/hW A 1.76 10.47 8.8 5.0 2.06 8.29 10.3 1 Phase, 220V, 60Hz dB Hi 43, Me 40, Lo 37 49 mm 318 × 1098 × 248 640 × 850 × 290 kg Yellowish white 15 Stucco white 46 – 2KS252H5AB04 (Rotary type) × 1 kW – 1.2 – Line starting Slit fins & inner grooved tubing Straight fin & inner grooved tubing Capillary tubes + Electric expansion valve kg R R22 1.25 (Pre-Charged up to the piping length of 7m) 0.65 (ATMOS NM56M or SUNISO 4GDID) Microcomputer control W (Cooling) SRC52CF-BP CMM Tangential fan × 1 Propeller fan × 1 46 20 Polypropylene net (washable) × 2 – – 29 38 – Cushion rubber (for compressor) – Wireless-Remote control – Microcomputer thermostat – RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange) O.D Connecting method Attached length of piping mm (in) Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error protection Liquid line: φ6.35 (1/4″) Gas line: φ15.88 (5/8″) Flare connecting Liquid line: 0.70m Gas line: 0.63m Insulation Drain hose Power source supply – Necessary (Both sides) Connectable Terminal block (Screw fixing type) 1.5 mm2 × 4 cores (Including earth cable) Terminal block (Screw fixing type) Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1) Wired-Remote control Size × Core number Connecting method Accessories (included) Optional parts Connection wiring Notes (1) The data are measured at the following conditions. Item Operation Cooling Indoor air temperature Outdoor air temperature DB WB DB WB 27ºC 29ºC 19ºC 19ºC 35ºC 46ºC 24ºC 24ºC The piping length is 7.5m. (2) The operation data are applied to the 220V districts respectively. (3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.) If the piping length is longer, when it is 7 to 25m, add 25g refrigerant per meter. - 4- Standards ISO-T1, JIS C9612 ISO-T3, SASO 385/386 Model SRK71CF-BP (Indoor unit) SRC71CF-BP (Outdoor unit) (220V) Model SRK71CF-BP Item Refrigerant piping ISO-T3 (SASO) ISO-T1 (JIS) Cooling capacity Cooling power input Energy efficiency ratio Rating current Cooling capacity Cooling power input Energy efficiency ratio Rating current Power source Noise level Cooling Sound level Exterior dimensions Height × Width × Depth Color Net weight Refrigerant equipment Compressor type & Q’ty Motor Starting method Heat exchanger Refrigerant control Refrigerant(3) Refrigerant oil Deice control Air handling equipment Fan type & Q’ty Motor Air flow (at High) (Cooling) Air filter, Q’ty Shock & vibration absorber Electric heater Operation control Operation switch Room temperature control Pilot lamp Safety equipment O.D Connecting method Attached length of piping kW kW Btu/hW A kW kW Btu/hW A SRC71CF-BP 7.03 2.12 11.33 10.6 6.3 2.48 8.67 12.4 1 Phase, 220V, 60Hz dB Hi 45, Me 42, Lo 39 55 mm 318 × 1098 × 248 750 × 880 × 340 kg Yellowish white 15 Stucco white 67 – 2JS318H5AB02(Rotary type) × 1 kW – 1.5 – Line starting Slit fins & inner grooved tubing Straight fin & inner grooved tubing Capillary tubes + Electric expansion valve R22 1.75 (Pre-charged up to the piping length of 7m) 0.7 (ATMOS NM56M or SUNISO 4GDID) Microcomputer control kg R W CMM Tangential fan × 1 Propeller fan × 1 46 20.5 Polypropylene net (washable) × 2 – – 73 60 – Cushion rubber (for compressor) – Wireless-Remote control – Microcomputer thermostat – RUN (Green), TIMER (Yellow), HI POWER (Green), ECONO (Orange) Compressor: overheat protection, Frost protection, Serial signal error protection, Indoor fan motor error protection mm (in) Insulation Drain hose Power source supply Size × Core number Connecting method Accessories (included) Optional parts Connection wiring Liquid line: φ6.35 (1/4″) Gas line: φ15.88 (5/8″) Flare connecting Liquid line: 0.70m – Gas line : 0.63m Necessary (Both sides) Connectable Terminal block (Screw fixing type) 1.5 mm2 × 4 cores (Including earth cable) Terminal block (Screw fixing type) Mounting kit, Clean filter (Natural enzyme filter × 1, Photocatalytic washable deodorizing filter × 1) Wired-Remote control Notes (1) The data are measured at the following conditions. Item Operation Cooling Indoor air temperature Outdoor air temperature DB WB DB WB 27ºC 29ºC 19ºC 19ºC 35ºC 46ºC 24ºC 24ºC The piping length is 7.5m. (2) The operation data are applied to the 220V districts respectively. (3) The refrigerant quantity to be charged includes the refrigerant in 7 m connecting piping. (Purging is not required even in the short piping.) If the piping length is longer, when it is 7 to 25m, add 25g refrigerant per meter. - 5- Standards ISO-T1, JIS C9612 ISO-T3, SASO 385/386 2.2 Range of usage & limitations Models All models Item Indoor return air temperature (Upper, lower limits) Cooling operation: Approximately 21 to 32 °C Outdoor air temperature (Upper, lower limits) Cooling operation: Approximately 21 to 54 °C Refrigerant line (one way) length Max. 25m Vertical height difference between outdoor unit and indoor unit Max. 15m Rating ± 10% Power source voltage Voltage at starting Min. 85% of rating Frequency of ON-OFF cycle Max. 10 times/h ON and OFF interval Max. 3 minutes 2.3 Exterior dimensions (1) Indoor unit Models SRK52CF-BN, 71CF-BN, 52CF-BP, 71CF-BP Unit: mm A 1098 248 3 9 48 318 Piping hole right (left) Terminal block 55 Indoor unit 886 450 49.5 50 Installation board 106 299 50 150 349 8.5 106 60 44.5 301.8 25 4 19 17.3 1090 51.2 64 4 43.5 55 77 55 53.5 7.7 44.5 47 221.5 25 Piping for Gas (ø15.88) 633.5 Piping for Liquid (ø6.35) 703.5 Drain hose 772 (ø16) Piping hole (ø65) Piping hole (ø65) VIEW A - 6- (2) Outdoor unit Models SRC52CF-BN, 52CF-BP 50 Drain holes 12 Unit: mm 14 49.6 314 290 43.5 12 328 286.4 476 203.1 510 Elogated hole (2-12 x16) 136.9 850 Terminal block 640 124 34.6 42.7 Ground terminal 100.3 15 20˚ 20˚ Service valve (Liquid) ø6.35 (1/4'') Service valve (Gas) ø15.88 (5/8'') Models SRC71CF-BN, 71CF-BP Unit: mm 223 310 60 15 2- R7 61 150 Drain holes 580 27 150 880 418 19 61 380 340 47.5 .5 32 88 Terminal block Service valve (Liquid) 24 30° 48.5 750 Flare fitting ø6.35(1/4") Service valve(Gas) 103.5 Flare fitting ø15.88(5/8") 165.5 - 7- 25 2.4 Piping system Models SRK52CF-BN, 52CF-BP Indoor unit Outdoor unit Flare connecting Piping (Gas) ø15.88 Cooling cycle Outdoor air temp. sensor Service valve (Gas) Muffler* Check joint Heat exchanger sensor Humidity sensor Room temp. sensor Heat exchanger Discharge pipe temp. sensor Heat exchanger sensor Heat exchanger Compressor Piping (Liquid) ø6.35 Accumulator Service valve (Liquid) Capillary tube Electronic expansion valve Strainer Flare connecting Capillary tube * except for 52CF-BN Models SRK71CF-BN, 71CF-BP Indoor unit Outdoor unit Flare connecting Piping (Gas) ø15.88 Cooling cycle Outdoor air temp. sensor Service valve (Gas) Muffler* Check joint Humidity sensor Room temp. sensor Heat exchanger sensor Heat exchanger sensor Heat exchanger Discharge pipe temp. sensor Heat exchanger Compressor Piping (Liquid) ø6.35 Accumulator Service valve (Liquid) Capillary tube Flare connecting Electronic expansion valve Strainer * except for 71CF-BP - 8- Strainer 2.5 Selection chart Correct the cooling capacity in accordance with the conditions as follows. The net cooling capacity can be obtained in the following way. Net capacity = Capacity shown on specification ✕ Correction factors as follows. (1) Coefficient of cooling capacity in relation to temperatures S SRK52CF-BN, 52CF-BP Coefficient of cooling capacity in relation to temperature 1.3 1.2 Cooling 1.1 1.0 0.9 0.8 0.7 Outdoor air D.B. temperature °C D.B. Cooling operation 0.6 ISO-T3 Standard Condition ISO-T1 Standard Condition Applicable range 54 50 45 40 35 30 25 21 16 18 20 24 22 Indoor air W.B. temperature °C W.B. S SRK71CF-BN, 71CF-BP Coefficient of cooling capacity in relation to temperature 1.3 1.2 Cooling 1.1 1.0 0.9 0.8 0.7 Outdoor air D.B. temperature °C D.B. Cooling operation 0.6 ISO-T3 Standard Condition ISO-T1 Standard Condition Applicable range 54 50 45 40 35 30 25 21 16 18 20 22 24 Indoor air W.B. temperature °C W.B. (2) Correction of cooling capacity in relation to one way length of refrigerant piping It is necessary to correct the cooling capacity in relation to the one way piping length between the indoor and outdoor units. Piping length [m] 7 10 15 20 25 Cooling 1.0 0.99 0.975 0.965 0.95 How to obtain the cooling capacity Example : The net cooling capacity of the model SRK71CF-BN with the piping length of 15m, indoor wet-bulb temperature at 19.0˚C and outdoor dry-bulb temperature 35˚C is Net cooling capacity = 7030 ✕ SRK71CF-BN - 9- 0.975 Length 15m ✕ 1.0 = Factor by air temperatures 6854 W HA JEM-A S/N R/L 1 L G Power Source 1 Phase 220-240V 50Hz J J BK RD WH N RD Y/GN BK WH 1 2/N N F 250V 3.15A CC CM2 WH Option ZNR XR1 XR2 XR3 XR4 CNT CM1 BK F 250V 3.15A 52X1 Y 10 - CNX CNM CNE CNG ~ ~ - + DS 11 9 CNB 52X3 RD WH BK - CNY 52X4 CNF BL XYZ Parts name Compressor motor Fuse Fan motor(Indoor) Fan motor(Outdoor) Flap motor Louver motor Room temp.sensor Heat exch.sensor(Indoor unit) WH CNU Display SM Wireless R-AMP Th1 Th2 Th3 Terminal block Printed circuit board To wired remote control (Option) CNE EEV 52X1 52X3 52X4 Th4 Meaning of marks CM F FMI FMO SM LM1,2 Th1 Th2 FMo 3 CNG Symbol OR Y RD 7 5 Color symbol Black Blue Orange Red Yellow White Yellow/Green Green CFO Y XYZ BK BL OR RD Y WH Y/G GR CM W Printed circuit board XR5 LM1 U V ZNR LM2 WH RD L Th5 Th6 Symbol Th3 Th4 Th5 Th6 ZNR EEV DS 52X1~4 Parts name Humidity sensor Heat exch.sensor(Outdoor unit) Outdoor air temp.sensor Discharge pipe temp.sensor Varistor Electronic expansion valve Diode stack Auxiliary relay Symbol CC CFO TB XR1 XR2 XR3 XR4 XR5 Parts name Capacitor for CM Capacitor for FMO Terminal block Operation indication (DC12) Heating indication (DC12) ON indication for CM(DC12) Check indication (DC12) Distant operation ELECTRICAL DATA FMI 6 5 4 3 1 CNU Y/GN 3 3 BL Y WH BK RD Y/GN RD 3 WH 2/N BK TB 3.1 Electrical wiring Heat exchanger TB Model SRK52-CF-BN Outdoor unit Indoor unit Option HA JEM-A XR1 XR2 XR3 XR4 S/N R/L Y/GN G 2/N N 1 L J N F 250V 3.15A CC CM1 BK F 250V 3.15A 52X1 Y CNY 11 - CNG CNF CNB ~ - + DS 11 9 52X3 RD WH BK CNE ~ XY Z Wireless R-AMP Black Blue Orange Red Yellow White Yellow/Green Green Th3 1 5 Terminal block To wired remote control (Option) CNE Parts name Compressor motor Fuse Fan motor(Indoor) Fan motor(Outdoor) Flap motor Louver motor Room temp.sensor Heat exch.sensor(Indoor unit) EEV 52X1 52X3 52X4 52X5 Th4 Meaning of marks CM F FMI FMO SM LM1,2 Th1 Th2 WH CNU Printed circuit board CNG Symbol FMo 3 BK 52X5 Th2 7 XYZ Display Th1 OR Y RD BL 52X4 BK BL OR RD Y WH Y/G GR CFO Y CNX Color symbol CM W Printed circuit board ZNR SM U CM2 WH V CNT CNM WH RD L ZNR LM1 BK RD J XR5 LM2 Power Source 1 Phase 220-240V 50Hz 3 RD Y/GN 1 BK FMI 6 5 4 3 1 CNU WH BL Y WH BK RD TB WH Y/GN RD 3 WH 2/N BK Heat exchanger TB Th5 Th6 Symbol Th3 Th4 Th5 Th6 ZNR EEV DS 52X1~5 Parts name Humidity sensor Heat exch.sensor(Outdoor unit) Outdoor air temp.sensor Discharge pipe temp.sensor Varistor Electronic expansion valve Diode stack Auxiliary relay Symbol CC CFO TB XR1 XR2 XR3 XR4 XR5 Parts name Capacitor for CM Capacitor for FMO Terminal block Operation indication (DC12) Heating indication (DC12) ON indication for CM(DC12) Check indication (DC12) Distant operation Model SRK71CF-BN Outdoor unit Indoor unit HA JEM-A S/N R/L Y/GN G Power Source 1 Phase 220V 60Hz 3 2/N N 1 L J J BK RD RD Y/GN 1 BK FMI 6 5 4 3 1 CNU WH BL Y WH BK RD Y/GN RD 3 WH 2/N BK TB WH Heat exchanger TB N F 250V 3.15A CC CM2 WH Option ZNR XR1 XR2 XR3 XR4 W F 250V 3.15A 52X1 Y XR5 CNY 12 - CNX CNM CNE CNG ~ - + DS 11 9 52X3 52X4 BL XYZ Parts name Compressor motor Fuse Fan motor(Indoor) Fan motor(Outdoor) Flap motor Louver motor Room temp.sensor Heat exch.sensor(Indoor unit) WH CNU Display SM Wireless R-AMP Th1 Th2 Th3 Terminal block Printed circuit board To wired remote control (Option) CNE EEV 52X1 52X3 52X4 Th4 Meaning of marks CM F FMI FMO SM LM1,2 Th1 Th2 FMo 3 CNG Symbol OR Y RD 7 5 Color symbol Black Blue Orange Red Yellow White Yellow/Green Green ~ CNB CNF XYZ BK BL OR RD Y WH Y/G GR CFO Y RD WH BK - LM1 CM CM1 BK ZNR LM2 U V Printed circuit board CNT WH RD L Th5 Th6 Symbol Th3 Th4 Th5 Th6 ZNR EEV DS 52X1~4 Parts name Humidity sensor Heat exch.sensor(Outdoor unit) Outdoor air temp.sensor Discharge pipe temp.sensor Varistor Electronic expansion valve Diode stack Auxiliary relay Symbol CC CFO TB XR1 XR2 XR3 XR4 XR5 Parts name Capacitor for CM Capacitor for FMO Terminal block Operation indication (DC12) Heating indication (DC12) ON indication for CM(DC12) Check indication (DC12) Distant operation Model SRK52CF-BP Outdoor unit Indoor unit Option HA JEM-A XR1 XR2 XR3 XR4 S/N R/L Y/GN G 2/N N 1 L J N F 250V 3.15A CC CM1 BK F 250V 3.15A 52X1 Y CNY 13 - CNG CNF CNB ~ - + DS 11 9 52X3 RD WH BK CNE ~ XY Z Wireless R-AMP Black Blue Orange Red Yellow White Yellow/Green Green Th3 1 5 Terminal block To wired remote control (Option) CNE Parts name Compressor motor Fuse Fan motor(Indoor) Fan motor(Outdoor) Flap motor Louver motor Room temp.sensor Heat exch.sensor(Indoor unit) EEV 52X1 52X3 52X4 52X5 Th4 Meaning of marks CM F FMI FMO SM LM1,2 Th1 Th2 WH CNU Printed circuit board CNG Symbol FMo 3 BK 52X5 Th2 7 XYZ Display Th1 OR Y RD BL 52X4 BK BL OR RD Y WH Y/G GR CFO Y CNX Color symbol CM W Printed circuit board ZNR SM U CM2 WH V CNT CNM WH RD L ZNR LM1 BK RD J XR5 LM2 Power Source 1 Phase 220V 60Hz 3 RD Y/GN 1 BK FMI 6 5 4 3 1 CNU WH BL Y WH BK RD TB WH Y/GN RD 3 WH 2/N BK Heat exchanger TB Th5 Th6 Symbol Th3 Th4 Th5 Th6 ZNR EEV DS 52X1~5 Parts name Humidity sensor Heat exch.sensor(Outdoor unit) Outdoor air temp.sensor Discharge pipe temp.sensor Varistor Electronic expansion valve Diode stack Auxiliary relay Symbol CC CFO TB XR1 XR2 XR3 XR4 XR5 Parts name Capacitor for CM Capacitor for FMO Terminal block Operation indication (DC12) Heating indication (DC12) ON indication for CM(DC12) Check indication (DC12) Distant operation Model SRK71CF-BP Outdoor unit Indoor unit 4. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER 4.1 Operation control function by remote control switch (1) Wireless remote control Models All models S Operation section FAN SPEED button Each time the button is pushed, the cator is switched over in turn. OPERATION MODE select button indi- Each time the button is pushed, the cator is switched over in turn. indi- ON/OFF (luminous) button HI POWER/ECONO button Press for starting operation, press again for stopping. This button changes the HIGH POWER/ ECONOMY mode. AIR FLOW (UP/DOWN) button TEMPERATURE button This button changes the air flow (up/down) mode. This button sets the room temperature. (This button changes the present time and TIMER time.) AIR FLOW (LEFT/RIGHT) button This button changes the air flow (left/right) mode. SLEEP button This button selects SLEEP operation. CANCEL button This button cancels the ON timer, OFF timer, and SLEEP operation. CLEAN switch OFF TIMER button This switch changes the CLEAN mode. This button selects OFF TIMER operation. ON TIMER button RESET switch This button selects ON TIMER operation. Switch for resetting microcomputer. TIME SET UP switch This switch for setting the time. • The above illustration shows all controls, but in practice only the relevant parts are shown. S Indication section ON/OFF TIMER indicator Indicates during ON/OFF TIMER operation. SLEEP indicator Indicates during SLEEP operation. OPERATION MODE indicator Indicates selected operation with lamp. [ (Auto) • (Cool) • (Fan) • (Dry)] TEMPERATURE indicator Indicates set temperature. (Does not indicate temperature when operation mode is on AUTO) FAN SPEED indicator Indicates set air flow rate with TIME indicator lamp. Indicates present time or timer setting time. AIR FLOW indicator CLEAN indicator Shows selected flap and louver mode. Indicates during CLEAN operation. HI POWER/ ECONO MODE indicator Indicates during High power/economy mode operation. - 14 - (2) Wired remote control (Optional parts) The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in the liquid crystal display area are shown in the figure for the sake of explanation. Characters displayed with dots in the liquid crystal display area are abbreviated. Note (1) The SRK models don't support the switches and functions displayed in [ ]. Pull the cover downward to open it. Central control display [Vent indicator] Displayed when the air conditioning system is controlled by the option controller. Indicates operation in the ventilation mode. Weekly timer display Displays the settings of the weekly timer. Timer operation display Displays the settings related to timer operation. Operation setting display area Temperature setting switches Operation/Check indicator light These switches are used to set the temperature of the room. During operation: Lit in green In case of error: Flashing in red TIMER switch Operation/Stop switch This switch is used to select a timer mode. (The comfortable timer or sleep operation cannot be selected.) This switch is used to operate and stop the air conditioning system. Press the switch once to operate the system and press it once again to stop the system. Displays setting temperature, airflow volume, operation mode and operation message. MODE switch This switch is used to switch between operation modes. (The clean operation cannot be selected.) FAN SPEED switch Timer setting switches This switch is used to set the airflow volume. (AUTO, HI POWER or ECONO cannot be selected.) These switches are used to set the timer mode and time. [VENT switch] Switch that operates the connected ventilator. [GRILL switch] This switch has no function. When this switch is pressed, (Invalid Operation) is displayed, but it does not mean a failure. LOUVER switch This switch is used to operate/stop the swing louver. (UP/down swing only) AIR CON No. (Air conditioning system No.) switch Displays the number of the connected air conditioning system. ("00" appears.) SET switch This switch is used at servicing. This switch is used to apply the timer operation setting. This switch is also used to make silent mode operation settings. [TEST switch] [RESET switch] This switch is used during test operation. Press this switch while making settings to go back to the previous operation. This switch is also used to reset the FILTER CLEANING message display. (Press this switch after cleaning the air filter.) [CHECK switch] * If you press any of the switches above and But it does not mean a failure. INVALID OPER is display, the switch has no function. - 15 - (3) Unit indication section RUN light (green) Models All models • Illuminates during operation. TIMER light (yellow) Illuminates during TIMER operation. HI POWER light (green) Illuminates during HIGH POWER operation. ECONOMY light (orange) Illuminates during ECONOMY operation. 4.2 Unit ON/OFF button When the remote control batteries become weak, or if the remote control is lost or malfunctioning, this button may be used to turn the unit on and off. (1) Operation Push the button once to place the unit in the automatic mode. Push it once more to turn the unit off. (2) Details of operation The unit will go into the automatic mode in which it automatically determines, from room temperature (as detected by sensor), whether to go into the cooling or thermal dry modes. Function Operation mode Room temperature setting Cooling About 24ºC Thermal dry About 24ºC Fan speed Flap Timer switch Auto Auto Continuous Unit ON/OFF button 4.3 Power blackout auto restart function (1) Power blackout auto restart function is a function that records the operational status of the air-conditioner immediately prior to it being switched off by a power cut, and then automatically resumes operations at that point after the power has been restored. (2) The following settings will be cancelled: (a) Timer settings Jumper wire (J7) (b) High-power operations EXTERNAL INPUT WIRED REMOCON Notes (1) The power blackout auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with your dealer if this function needs to be switched off. (2) When power failure ocurrs, the timer setting is cancelled. Once power is resumed, reset the timer. (3) If the jumper wire (J7) “AUTO RESTART” is cut, auto restart is disabled. (See the diagram at right) OPE PERMISSION CUSTOM AUTO RESTART LO TEMP DIRT PREVENT COOL ONLY HI CEIL PANEL 50/60 - 16 - 4.4 Custom cord switching procedure If two wireless remote controls are installed in one room, in order to prevent wrong EXTERNAL INPUT WIRED REMOCON operation due to mixed signals, please modify the printed circuit board in the indoor OPE PERMISSION CUSTOM unit’s control box and the remote control using the following procedure. Be sure to modify Jumper wire (J4) AUTO RESTART LO TEMP both boards. If only one board is modified, receiving (and operation) cannot be done. DIRT PREVENT COOL ONLY (1) Modifying the indoor unit’s printed circuit board HI CEIL PANEL Take out the printed circuit board from the control box and cut off jumper wire (J4) using 50/60 wire cutters. After cutting of the jumper wire, take measures to prevent contact with the other the lead wires, etc. (2) Modifying the wireless remote control Cut 1) Remove the battery. 2) Cut the jumper wire shown in the figure at right. 4.5 Flap and louver control Control the flap and louver by AIRFLOW (LEFT/RIGHT) button on the wireless remote control. (UP/DOWN) and (1) Swing flap Flap moves in upward and downward directions continuously. (2) Swing louver Louver moves in left and right directions continuously. (3) When not operating The flap returns to the position of air flow directly below, when operation has stopped. (4) Multi-directional Air Flow (up/down air scroll and left/right air scroll) Activating both up/down air swing and left/right air swing at the same time results in a multi-directional air flow. Up/down air scroll Left/right air scroll In COOL, DRY and FAN operation In COOL, DRY and FAN operation Stops at this position for 5 seconds. Thick line Thin line : moves quickly : moves slowly Left louver Right louver (5) Memory flap (Flap or Louver stopped) When you press the AIRFLOW (UP/DOWN or LEFT/RIGHT) button once while the flap or louver is operating, it stops swinging at an angle. Since this angle is memorized in the micro-computer, the flap or louver will automatically be set at this angle when the next operation is started. ¡ Recommendable stopping angle of the flap COOL•DRY Horizontal blowing - 17 - 4.6 Comfortable timer setting If the timer is set at ON when the operation select switch is set at the cooling, or the cooling in auto mode operation is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature. (Max. 60 minutes) Operation mode Operation start time correction value (Min.) 3 < Room temp. – Setting temp. 1 < Room temp. – Setting temp. = ≤3 Room temp. – Setting temp. = ≤1 +5 No change –5 At cooling Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1). (2) This function does not actuate when the operation select switch is set at the dehumidifying as well as the dehumidifying in the auto mode. However, the operation of item (1) above is performed during the dehumidifying in the auto mode. (3) During the comfortable timer operation, both the run light and timer light illuminate and the timer light goes off after expiration of the timer, ON setting time. (Example) Cooling Room temperature Corrects the starting time of next operation by calculating the temperature difference. ¡ If the difference (= Room temperature – Setting temperature) is 4ºC, the correction value is found to be +5 minutes from the table shown above so that the starting time of next operation is determined as follows: 15 min. earlier + 5 min. = 20 min. earlier ↑ ↑ Correction value Current operation start time Setting temperature Operation starting time Time 15 min. earlier 10 min. earlier 5 min. earlier Setting time 4.7 Sleep timer operation Pressing the SLEEP button causes the temperature to be controlled as shown in the following chart with respect to the set temperature. Cooling +1.0 Temperature setting (˚C) 0 -1.0 Timer operation (time) 0 1.0 2.0 Start - 18 - 4.8 Outline of cooling operation (1) Operation of major functional components Item When the compressor command is OFF When the compressor command is ON When the compressor goes OFF due to an anomalous stop. ON ON OFF Flap and louver ON or OFF ON or OFF Stop position control Display Lights up Lights up Lights up or flashes Functional components Indoor fan motor Outdoor fan motor Electric expansion valve ON Depending on the stop mode Depending on the EEV control Depending on the stop mode (2) Fan speed switching Fan speed switching AUTO Flow control Air scroll Swing flap or louver Auto fan control Swing stop (i) HIGH MED LOW Speed 8 Speed 6 Speed 4 Speed 8 Speed 6 Speed 4 Speed 8 Speed 6 Speed 4 Auto fan control The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the room temperature sensor) and the termostat setting as shown below. Speed 8 Speed 6 Speed 4 +1 Thermostat setting point +2 +3 +4 (3) Thermostat operation The compressor and outdoor fan and turned on and off as shown below according to the temperature setting. ON Compressor Outdoor fan OFF -1 Room temp. Set temp. (4) HIGH POWER operation ( “HI POWER” button on the remote control : ON) The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting. Indoor unit fan Speed 9 fixed Outdoor unit fan ON Compressor ON Notes (1) Room temperature is not adjusted during the HIGH POWER operation. (2) Protective functions will actuate with priority even during the HIGH POWER operation. (5) ECONOMY operation ( “ECONO” button on the remote control : ON) The set temperature changes as shown at right, and the indoor unit fan speed is set on speed 4. - Running time Set temperature compensation Running start ~ 1 hour Set temperature +0.5 1~2 hours Set temperature +1.0 2 hours ~ Set temperature +1.5 19 - 4.9 Outline of dehumidifying operation (1) Choose the appropriate operation block area by the difference between room temperature and thermostat setting temperature as shown below. ¡ Operation block area D Block C Block –2 Room temp. B Block A Block 0 +3 – Setting temp.(deg) (2) Start up operation C.D Block A.B Block Compressor ON and outdoor fan OFF Compressor ON and outdoor fan OFF Speed 4 Speed 4 Speed 1 Indoor fan OFF 20 seconds 0 3 6 Start 9 Indoor fan OFF 0 12 minutes 12 minutes Start Temperature check Temperature check Operation block decision Note (1) Thermostat operation is performed in A, B Block. When compressor and indoor fan stop by thermostat operation within 12 minutes from start, temperature check is performed by operating indoor fan at speed 1 for 20 seconds before finishing 12 minutes and allowing decision of next operation block. (3) DRY operation After finishing start up operation described in (2) above, thermal dry operation is performed at 8 minutes intervals, according to the difference between room temperature and thermostat setting temperature as shown below. Beside, 1 cycle of this operating time consists of 8 minutes, 7 cycle operation is performed then. D Block C Block Compressor ON and outdoor fan OFF Compressor ON and outdoor fan OFF Speed 4 Speed 1 Speed 1 Indoor fan OFF 20 seconds 0 4 Start Indoor fan OFF 20 seconds 8 minutes 0 Temperature check 3 8 minutes Start Temperature check Operation block decision B Block A Block Compressor ON and outdoor fan OFF Speed 4 Compressor ON and outdoor fan OFF Speed 4 Speed 1 Indoor fan Indoor fan 20 seconds OFF 0 Start 4 OFF 8 minutes Temperature check 0 8 minutes Start Temperature check Operation block decision (4) ECONOMY operation ( “ECONO” button on the remote control : ON) The set temperature changes as shown at right, and the Running time indoor unit fan speed is set on speed 4 . Running start ~ 1 hour - 20 - Set temperature compensation Set temperature +0.5 1~2 hours Set temperature +1.0 2 hours ~ Set temperature +1.5 4.10 Outline of automatic operation (1) Determination of operation mode The unit checks the room temperature and the outdoor air temperature after operating the indoor and outdoor blowers for 20 seconds, determines the operation mode and the room temperature setting correction value, and then begins in the automatic Room temperature (˚C) operation. 27.5 Cooling 25.5 Dehumidifying 19.5 30 18 Outdoor temperature (˚C) (2) Within 30 minutes after either auto or manual operation stops, if auto operation is started, or if you switch to auto operation during manual operation, the system runs in the previous operation mode. (3) The temperature is checked 1 time in 30 minutes after the start of operation, and if the judgment differs from the previous operation mode, the operation mode changes. 4.11 Set temperature selection If the LO TEMP on the indoor unit’s printed circuit board is modified, the unit can lower EXTERNAL INPUT WIRED REMOCON the set temperature 2º lower than the set temperature in the remote control’s display. OPE PERMISSION CUSTOM (1) Modifying the indoor unit’s printed circuit board Jumper wire (J8) AUTO RESTART LO TEMP Take out printed circuit board from the control box and cut jumper wire (J8) using wire DIRT PREVENT COOL ONLY cutters. HI CEIL PANEL After cuting of the jumper wire, take measures to prevent contact with the other the 50/60 lead wires, etc. (2) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of the wireless remote control and the setting temperature. AUTO -6 -5 -4 -3 -2 -1 ±0 +1 +2 +3 +4 +5 +6 COOL, DRY 18 19 20 21 22 23 24 25 26 27 28 29 30 Setting temperature (J8 shortcicuit) 18 19 20 21 22 23 24 25 26 27 28 29 30 Setting temperature (J8 release) 16 17 18 19 20 21 22 23 24 25 26 27 28 Signals of wireless remote control (Display) - 21 - 4.12 Outline of fan operation (1) Operation of major functional components Fan speed switching Functional components 52C High power HIGH MED LOW ECONO Speed 6 Speed 4 Speed 2 OFF Indoor fan motor (2) AUTO Speed 9 Speed 8 Speed 8 Outdoor fan motor OFF Flap and louver Depend on the flap and louver control HIGH POWER operation (“HI POWER” button on the remote control : ON) The following operation is performed for 15 minutes without relation to the set temperature or fan speed setting. Indoor unit fan Speed 9 fixed Outdoor unit fan OFF Compressor OFF Note (1) Protective functions will actuate with priority even during the HIGH POWER operation. 4.13 Regulation of outdoor air flow The fan operates as follows according to the outdoor air temperature. S SRK71CF-BN, 71CF-BP S SRK52CF-BN, 52CF-BP Cooling, thermaldry Cooling, thermaldry 3rd speed 2nd speed 2nd speed 1st speed 1st speed 32 30 Outdoor air temp. (˚C) 23 - 22 - 25 30 Outdoor air temp. (˚C) 32 4.14 Stop mode Functional components Operation When the complete stop command given, when there is and abnormal stoppage command Cooling,cooling oriented dehumidifying When stoppage occurs due to thermostat operation, switching operations and protective function operations Cooling,cooling oriented dehumidifying 2 min.55 sec. 3 min. ON Compressor OFF 1 min. ON 1 min. Outdoor unit fun OFF ON Indoor unit fun OFF Fully closed Flap Set location 2 min.55 sec. 470 pulse EEV 470 pulse 150 pulse EEV control Stop instructions All stop - 23 - Stop instructions Restart 4.15 External control (remote display)/control of input signal Make sure to connect the wired remote control unit. Control of input signal is not available without the wired remote control unit. (1) External control (remote display) output Following output connectors (CNT) are provided on the printed circuit board of indoor unit. (a) Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation. (b) Heating output: Power to engage DC 12V relay (provided by the customer) is outputted during the heating operation. (c) Compressor ON output: Power to engage DC 12V relay (provided by the customer) is outputted while the compressor is operating. (d) Error output: When any error occurs, the power to engage DC 12V relay (provided by the customer) is outputted. (2) Control of input signal Control of input signal (switch input, timer input) connectors (CNT) are provided on the control circuit board of the indoor unit. However, when the operation of air conditioner is under the Center Mode, the remote control by CnT is invalid. (a) If the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB) are set, or “LEVEL INPUT” is selected in the wired remote control’s indoor unit settings. 1) Input signal to CnT OFF → ON Air conditioner ON 2) Input signal to CnT ON → OFF Air conditioner OFF ON ON CnT Input OFF OFF OFF Note (1) The ON with the * mark indicates an A Unit OFF B Unit *ON OFF OFF ON operation using the remote control unit switch, etc. ON ON OFF OFF (b) *ON ON ON When Jumper wire J1 on the PCB of indoor unit is cut at the field or “PULSE INPUT” is selected in the wired remote control’s indoor unit settings. Input signal to CnT becomes valid at OFF → ON only and the motion of air conditioner [ON/OFF] is inverted. ON CnT Input OFF A Unit OFF ON OFF OFF ON OFF ON B Unit ON OFF - 24 - 4.16 Operation permission/prohibition control The air conditioner operation is controlled by releasing the jumper wire (J3) on the indoor control board and inputting the external signal into the CnT. (1) The operation mode is switched over between Permission and Prohibition by releasing the jumper wire (J3) on the indoor control board. When the jumper wire (J3) is short circuited When the jumper wire (J3) is released Normal operation is enable (when shipping) Permission / Prohibition mode When CnT input is set to ON, the operation starts and When Cnt input is set to ON, the operation mode is if the input is set to OFF, the operation stops. changed to permission and if input is set to OFF the For the CnT and remote control inputs, the input which operation is prohibited. is activated later has priority and can start and stop the operation. (2) When the CnT input is set to ON (Operation permission) (a) The air conditioner can be operated or stopped by the signal from the remote control signal line. (When the "CENTER" mode is set, the operation can be controlled only by the center input. (b) When the CnT input is changed from OFF to ON, the air conditioner operation mode is changed depending on the status of the jumper wire (J1) on the indoor control board. When the jumper wire (J1) is short circuited When the jumper wire (J1) is released The signal (a) above starts the air conditioner. When the CnT input is set to ON, the air conditioner (Shipping status) starts operation. After that, the operation of the air conditioner depends on (a) above. (Local status) (3) When the CnT input is set to OFF (Prohibition) (a) The air conditioner cannot be operated or stopped by the signal from the remote control signal line. (b) The air conditioner operation is stopped when the CnT input is changed from ON to OFF. (4) When the operation permission / prohibition mode is set to effective by the indoor function setting selected by the remote control, the operation depends on (1) above. 4.17 Protective control function (1) Frost prevention for indoor heat exchanger (During cooling or dehumidifying) (a) Operating conditions 1) Indoor heat exchanger temperature sensor (detected with Th2) is lower than 2.5ºC. 2) 3 minutes elapsed after the start of operation. (b) Detail of frost prevention operation Compressor Indoor fan Outdoor fan (c) OFF Protects the fan tap just before frost prevention control. Depending on the stop mode Reset condition: Indoor heat exchanger temperature sensor (Th2) is higher than 15ºC. - 25 - (2) Dew condensation prevention control [Cooling (including automatic), cooling oriented dehumidifying operation] (a) Operating condition: When the following conditions are met after 5 minutes or more of continuous operation after operation starts. Prevention control • The humidity sensor value is 68% or higher (b) Operation contents Reset 1) Command of the electronic expansion valve. 63 2) When such a command is continued for 30 minutes or more, air direction 68 Humidity (%) controls will be as listed below: UP/ DOWN air scroll Flap swing, UP/DOWN air scroll Executes the command to the left. Situations besides the ones described above Controls the level of the UP/DOWN flap. Louver swing, LEFT/RIGHT air scroll, Executes the command to the left. LEFT/ RIGHT air scroll Multi-directional Air Flow Situations besides the ones described above (c) Controls the front of the LEFT/RIGHT louver . Reset condition: When the following condition is satisfied. • The humidity sensor value is less than 63%. (3) Indoor fan motor protection When the air-conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system. Timer light illuminates simultaneously and the run light flashing 6 times at each 8-second. (4) Three-minute forced operation When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the operation mode. (After 3 minutes has passed the thermal operation is effective.) However, stopping the compressor via a stop signal or protection control has priority. (5) Abnormality of outdoor unit When the indoor heat exchanger temperature does not fall to 25°C or below for 40 minutes after 5 minutes have elapsed since the compressor operation start, the abnormality stop occurs. (The timer light flashes 2 times.) (6) Compressor overheat protection If the discharge pipe temperature (sensed by Th6) exceeds 115°C, the compressor stops. If the temperature is 95ºC or lower after a 3minute delay, it starts again, but if this function is reactivated again within 60 minutes, it results in an abnormal stop. (Run light : ON, Timer light : 5 time flash) Operation possible Abnormal stop 95 115 Discharge pipe temperature (˚C) - 26 - (7) High-pressure control The outdoor heat exchanger temperature sensor detection temperature controls the compressor. ¡ When the outdoor heat exchanger temperature is > = (52 type: 74˚C, 71 type: 73˚C) Compressor ON or OFF OFF 68 52 type: 74 71 type: 73 Outdoor heat exchanger temp. (˚C) (8) Serial signal transmission error protection (a) Purpose: Prevents malfunction resulting from error on the indoor ↔ outdoor signals. (b) Detail of operation: If the compressor is operating and a serial signal cannot be received from the indoor control with outdoor control having serial signals continuously for 1 minute and 55 seconds, the compressor is stopped. After the compressor has been stopped, it will be restarted after the compressor start delay if a serial signal can be received again from the indoor control. (RUN light: ON, TIMER light: 6 time flash) (9) Sensor disconnection (room temperature, indoor heat exchanger, outdoor heat exchanger, outdoor temperature, discharge pipe) (a) Room temperature sensor If the temperature detected by the room temperature sensor is –20ºC or lower continuously for 15 seconds or longer while operation is stopped, an error indication is displayed. (Run light: 2 time flash, Timer light: ON) (b) Indoor heat exchanger temperature sensor If the temperature detected by the indoor heat exchanger temperature sensor is –20ºC or lower continuously for 15 seconds or longer while operation is stopped, an error indication is displayed. (Run light : 1 time flash, Timer light : ON) (c) Outdoor heat exchanger temperature sensor If the temperature detected by the outdoor heat exchanger temperature sensor is –64ºC or lower continuously for 15 seconds or longer while operation is stopped, an error indication is displayed. (Run light : keep flashing, Timer light : 2 time flash) (d) Outdoor air temperature sensor If the temperature detected by the outdoor air temperature sensor is –64ºC or lower continuously for 15 seconds or longer while operation is stopped, an error indication is displayed. (Run light : keep flashing, Timer light : 1 time flash) (e) Discharge pipe temperature sensor After the compressor has operated for 9 minutes continuously, if there is a disconnected signal for the discharge pipe temperature sensor detected -64°C for 15 seconds, the compressor stops. After a 3-minute delay, it restarts, but if an abnormality is detected 4 times continuously, the air-conditioner is stopped fully and an error indication is displayed. (Run light : keep flashing, Timer light : 4 time flash) - 27 - 4.18 List of indoor unit jumper selections Jumper No. Indication on Circuit Board With Factory Jumper Settings (short circuited) J1 EXTERNAL INPUT External input switching J2 WIRED REMOCON Wired remote control J3 J4 J5 J6 OPE PERMISSION CUSTOM BLANK BLANK Operation permission/prohibition Custom cord switching J7 J8 J9 AUTO RESTART LO TEMP DIRT PREVENT Auto restart Set Temperature Selection J10 J11 J12 COOL ONLY HI CEIL PANEL J13 50/60 Function Name LEVEL INPUT Disabled No Jumper (Open) Reference Page PULSE INPUT Page 24 Enabled Wireless Remote Control (Disabled) Page 37 Normal operation Normal Enabled Select Page 25 Page 17 Enabled Disabled Disabled Enabled Page 16 Page 21 No function No function EXTERNAL INPUT WIRED REMOCON OPE PERMISSION CUSTOM AUTO RESTART LO TEMP DIRT PREVENT COOL ONLY HI CEIL PANEL 50/60 - 28 - 5. APPLICATION DATA SAFETY PRECAUTIONS ¡ Please read these “Safety Precautions” first then accurately execute the installation work. ¡ Though the precautionary points indicated herein are divided under two headings, WARNING and CAUTION , those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section. However, there is also a possibility of serious consequences in relationship to the points listed in the CAUTION section as well. In either case, important safety related information is indicated, so by all means, properly observe all that is mentioned. ¡ After completing the installation, along with confirming that no abnormalities were seen from the operation tests, please explain operating methods as well as maintenance methods to the user (customer) of this equipment, based on the owner’s manual. Moreover, ask the customer to keep this sheet together with the owner’s manual. WARNING ¡ To disconnect the appliance from the mains supply this appliance must be connected to the mains by means of a circuit breaker or a switch (use a recognized 20A) with a contact separation of at least 3mm. ¡ The appliance shall be installed in accordance with national wiring regulations. ¡ This system should be applied to places as households, residences and the like. Application to inferior environment such as engineering shop could cause equipment malfunction. ¡ Please entrust installation to either the company which sold you the equipment or to a professional contractor. Defects from improper installations can be the cause of water leakage, electric shocks and fires. ¡ Execute the installation accurately, based on following the installation manual. Again, improper installations can result in water leakage, electric shocks and fires. ¡ For installation, confirm that the installation site can sufficiently support heavy weight. When strength is insufficient, injury can result from a falling of the unit. ¡ For electrical work, please see that a licensed electrician executes the work while following the safety standards related to electrical equipment, and local regulations as well as the installation instructions, and that only exclusive use circuits are used. Insufficient power source circuit capacity and defective installment execution can be the cause of electric shocks and fires. ¡ Accurately connect wiring using the proper cable, and insure that the external force of the cable is not conducted to the terminal connection part, through properly securing it. Improper connection or securing can result in heat generation or fire. ¡ Take care that wiring does not rise upward, and accurately install the lid/service panel.It’s improper installation can also result in heat generation or fire. ¡ When setting up or moving the location of the air conditioner, do not mix air etc. or anything other than the designated refrigerant (R22) within the refrigeration cycle. Rupture and injury caused by abnormal high pressure can result from such mixing. ¡ Always use accessory parts and authorized parts for installation construction. Using parts not authorized by this company can result in water leakage, electric shock, fire and refrigerant leakage. ¡ Ventilate the work area when refrigerant leaks during the operation. Coming in contact with fire, refrigerant could generate toxic gas. ¡ Confirm after the foundation construction work that refrigerant does not leak. If coming in contact with fire of a fan heater, a stove or movable cooking stove, etc., refrigerant leaking in the room could generate toxic gas. CAUTION ¡ Execute proper grounding. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or a telephone ground wire. Improper placement of ground wires can result in electric shock. ¡ The installation of an earth leakage breaker is necessary depending on the established location of the unit. Not installing an earth leakage breaker may result in electric shock. ¡ Do not install the unit where there is a concern about leakage of combustible gas. The rare event of leaked gas collecting around the unit could result in an outbreak of fire. ¡ For the drain pipe, follow the installation manual to insure that it allows proper drainage and thermally insulate it to prevent condensation. Inadequate plumbing can result in water leakage and water damage to interior items. - 29 - 5.1 Selection of location for installation (1) Indoor unit (a) Where there is no obstructions to the air flow and where the cooled air can be evenly distributed. (b) A solid place where the unit or the wall will not vibrate. (c) A place where there will be enough space for servicing. (Where 6.5 cm Right side 10 cm Left side space mentioned right can be secured) 5 cm (d) Where wiring and the piping work will be easy to conduct. (e) The place where receiving part is not exposed to the direct rays of 1.5 cm the sun or the strong rays of the street lighting. (f) A place where it can be easily drained. (g) A place separated at least 1m away from the television or the radio. (To prevent interference to images and sound.) (h) A place that home appliance and househdd goods, etc. aren’t below unit. (2) Outdoor unit (a) A place where good air circulation can be obtained and where rain, snow or sunshine will not directly strike the unit. • A place where intake air temperature is over 46°C , it is desirable to install a roof avoiding the sunlight. (b) A place where discharged hot air or unit’s operating sound will not be a nuisance to the neighborhood. (c) A place where servicing space can be secured. (d) A place where vibration will not be enlarged. (e) Avoid installing in the following places. • A place near the bedroom and the like, so that the operation noise will cause no trouble. • A place where there is possibility of flammable gas leakage. • A place exposed to strong wind. Air inlet 100 • In a salt-laden atmosphere or a place where the generation of oil mist, vapor or fume is expected. Notes (1) Blowing out port and suction port on the back side of the unit can be installed at a distance of 10cm from walls. In case the barrier is 1.2m or above in height, or is overhead, the sufficient space between the unit and wall shall be secured. (2) When the unit is installed, the space of the following dimension and above shall be secured. ( No obstacles (Service space for electrical parts) 300 Air inlet Unit : mm Air Outlet ) No obstacles (An enough open space) (3) Limitations for one way piping length and vertical height difference. Model Item One way piping length (R) Outdoor Vertical height unit is lower difference (h) Outdoor unit is higher All models h r 25 m 15 m 15 m - 30 - 5.2 Installation of indoor unit (1) Installation of installation board (a) Fixing of installation board Look for the inside wall structures (Intersediate support or pillar and firaly install the unit after level surface has been checked.) 610 450 INSTALLATION SPACE (INDOOR UNIT) (FRONT VIEW) Unit: mm Mating mark for level surface Adjustment of the installation board in the horizontal direction is to be conducted with four screws in a temporary tightened state. Standard hole Fixing on concrete wall Use of nut anchor Use of bolt anchor Adjust so that board will be level by turning the board with the standard hole as the center. Nut (M6) Bolt (M6 × 12) Mounting board Max. 10 Mounting board (2) Drilling of holes and fixture sleeve (Option parts) When drilling the wall that contains a metal lath, wire lath or metal plate, be sure to use pipe hole sleeve sold separately. (a) Drill a hole with ø65 (b) Adjusting sleeve length whole core drill Cut off the sleeve collar in case of drawing piping out to rear. Indoor side Cut off the sleeve collar that can be seen from beneath the unit. Outdoor side Wall thickness + 1.5 cm Note (1) Drill a hole with incline of 5 degree from indoor side to outdoor side. (c) Install the sleeve (Inserting sleeve) (*Sleeve + *Inclined + *Sealing plate) Turn to tighten View of sleeve when installed Inclined flange Sealing Sleeve plate Paste Indoor side Outdoor side - 31 - Indoor side Outdoor side (3) Preparation of indoor unit (a) Mounting of connecting wires 1) Open the air inlet panel. 2) Remove the lid. 3) Remove the wiring clamp. 4) Connect the connecting wire securely to the terminal block. Use cables for interconnection wiring to avoid loosening of the wires. CENELEC code for cables. Required field cables. H05RNR4G1.5 (Example) H Harmonized cable type 05 300/500 volts R Natural-and/or synth, rubber wire insulation N Polychloroprene rubber conductors insulation R Standed core 4 Number of conductors G One conductor of the cable is the earth conductor (yellow/ green) 1.5 Section of copper wire (mm2) Terminal block Wiring Clamp Lid 1 Connect the connection wire securely to the terminal block. If the wire is not affixed completely, contact will be poor, and it is dangerous as the terminal block may heat up and catch fire. 2 Take care not to confuse the terminal numbers for indoor and outdoor connections. 3 Affix the connection wire using the wiring clamp. 5) Fix the connecting wire by wiring clamp. 6) Attach the lid. 7) Close the air inlet panel. (b) Installing the support of piping [Shaping the piping] [Taping of the exterior] Piping Drain hose ¡ Hold the bottom of the piping and fix direction before stretching it and shaping it. ¡ Tape only the portion that goes through the wall. Always tape the crossover wiring with the piping. [When the hose is extended to left and taken out from the rear center] [Top View] Left-hand-sided-piping Piping in the left rear direction Right-hand-sided-piping Piping in the right rear direction Piping in the right direction Piping in the left direction Piping is possible in the rear, left, left rear, left downward, right or downward direction. Right Rear Downward Left rear Left Left downward - 32 - [Drain hose changing procedures] 1. Remove the drain hose. 2. Remove the drain cap. ¡Remove the drain hose, ¡Remove it with hand or making it rotate. pliers. 3. Insert the drain cap. 4. Connect the drain hose. ¡Insert the drain cap which was removed at ¡I n s e r t t h e d r a i n h o s e procedure “2” securely using a hexagonal securely, makingit rotate. wrench, etc. Note: Be careful that if it is Note: Be careful that if it is not inserted not inserted securely, water securely, water leakage may occur. leakage may occur. Gutter Since this air conditioner has been designed to collect dew drops on the rear surface to the drain pan, do not attach the power cord above the gutter. Pipe accommodation section Drainage ¡ Arrange the drain hose in a downward angle. ¡ Avoid the following drain piping. Odor from the gutter Higher than specified The drain hose tip is in water. Weavy The gap to the ground is 5 cm or less. The drain hose tip is in the gutter. ¡ Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor. ¡ When the extended drain hose is indoor, always use a shield pipe (to be arranged by the user) and ensure it is thermally insulated. Shield pipe Drain hose (c) When it is exposed indoor. Extended drain hose Fixing of indoor unit Installation Steps 1 Pass the pipe through the hole in the wall, and hook the upper part of the indoor unit to the installation board. 2 Gently push the lower part to secure the unit. ¡ How to remove the indoor unit from the installation board 1 Push up at the marked portion of the indoor unit base lower latch, and slightly pull it toward you. (both right and left hand sides) (The indoor unit base lower latch can be removed from the installation board) 2 Push up the indoor unit upward. So the indoor unit will be removed from the installation board. - 33 - 5.3 Installation of outdoor unit (1) Installation of outdoor unit (a) Make sure that the unit is stable in installation. Fix the unit to stable base. (b) When installing the unit at a higher place or where it could be toppled by strong winds, secure the unit firmly with foundation bolts, wire, etc. (c) Perform wiring, making wire terminal numbers conform to terminal numbers of indoor unit terminal block. (d) Connect using ground screw located near mark. Power supply code CENELEC code for cables requiring field cables H05RNR3G2.5 5.4 Refrigerant piping (1) Preparation Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them. Outdoor unit side Indoor unit side Remove Remove ¡ Remove the flared nuts. (on both liquid and gas sides) (2) Press Press (Do not turn) Dimension A Liquid side (φ6.35): 9.0 mm Gas side (φ15.88): 19.4 mm ¡ Remove the flared nuts. (on both liquid and gas sides) ¡ Install the removed flared nuts to the pipes to be connected, then flare the pipes. Connection of refrigerant piping Outdoor unit side Indoor unit side ¡ Connect firmly gas and liquid side pipings by Torque wrench. ¡ Connect firmly gas and liquid side pipings by Torque wrench. Spanner (for fixing the piping) Torque wrench ¡ Specified torquing value: ¡ Specified torquing value: Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m) Liquid side (ø6.35) : 14.0~18.0N·m (1.4~1.8kgf·m) Gas side (ø15.88) : 68.0~82.0N·m (6.8~8.2kgf·m) Gas side (ø15.88) : 68.0~82.0N·m (6.8~8.2kgf·m) ¡ Always use a Torque wrench and back up spanner to tighten ¡ Use one more spanner to fix the valve. the flare nut. - 34 - (3) Air purge (a) Tighten all flare nuts in the pipings both indoor and outside will so as not to cause leak. (b) Connect service valve, charge hose, manifold valve and vacuum pump as is illustrated below. (c) Open manifold valve handle Lo to its full width, and perform vacuum or evacuation. Continue the vacuum or evacuation operation for 15 minutes or more and check to see that the vacuum gauge reads – 0.1 MPa (– 76 cmHg). (d) After completing vacuum operation, close the Lo handle fully and stop operation of the vacuum pump, then check to see that the vacuum gauge needle does not return. (e) Fully open service valve (Both gas and liquid sides) with hexagon headed wrench. (f) Detach tne charge hoses, from the service port. (g) Check for possible leakage of gas in the connection parts of both indoor and outdoor. Compound pressure gauge Service Valve (two-way valve) –0.1MPa (–76cmHg) Service Valve (three-way valve) Service Port Pressure gauge Gauge Manifold (Designed specifically for R22) Handle Hi. Handle Lo Charge hose (Designed specifically for R22) Vacuum pump Charge hose (Designed specifically for R22) Vacuum pump adapter (Anti-reverse flow type) (Designed specifically for R22) ¡ Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back into the system. Oil running back into an air-conditioning system may cause the refrigerant cycle to break down. Additional refrigerant charge When refrigerant piping exceeds 7m conduct additional refrigerant charge by weight after refrigerant piping completion. Additional charge amount per meter = 25g/m [Example] How much amount of additional charge for 25m piping? (25 – 7)m × 25g/m = 450g 450g for additional charge (4) Insulation of connecting portion (a) Cover the connecting portion of the refrigerant piping with the pipe cover and seal them. If neglecting to do so, moisture occurs on the piping and water will drip out. Vinyl tape (b) To cover the connecting portion with insulation materials, cut upper portion and then seal it with insulation materials. Finishing and fixing 1) Tie up the piping with wrapping tape, and shape it so that it conforms to which the pipe is attached. 2) Fix them with clamps as right figure. Insulation Refrigerant piping Electrical wiring Covering tape Drain hose Tapping screw - 35 - Cover the exterior portion with covering tape and shape the piping so it will match the contours of the route that the piping to take. Also fix the wiring and pipings to the wall with clamps. 5.5 Test run (1) Conduct trial run after confirming that there is no gas leaks. (2) When conducting trial run set the remote control thermostat to continuous operation position. However when the power source is cut off or when the unit’s operation switch is turned off or was turned to fan operation position, the unit will not go into operation in order to protect the compressor. (3) Explain to the customer on the correct usage of the air conditioner in simple layman’s terms. (4) Make sure that drain flows properly. (5) Standard operation data (220/240V) Model SRK52CF-BN Item Low pressure (MPa) Cooling Temp. difference between return air and supply air (°C) Cooling Running current (A) Cooling SRK52CF-BP 0.42 ~ 0.62 SRK71CF-BN 0.39 ~ 0.59 11 ~ 13 8.8 / 8.7 SRK71CF-BP 12 ~ 14 8.8 / – 10.6 / 10.4 10.6 / – Note (1) The data are measured at following conditions Ambient air temperature Indoor side: Cooling ... 27˚C DB, 19˚C WB Outdoor side: Cooling ... 35˚C DB, 24˚C WB 5.6 Precautions for wireless remote control installation and operation (1) Wireless remote control covers the following distances: (a) When operating facing the air conditioner: 5 m ss le or Wireless remote control 5 m or less or les s or le ss or less Notes (1) The remote control is correctly facing the sensing element of the air conditioner when being manipulated. (2) The typical coverage is indicated (in the left illustration). It may be more or less depending on the installation. (3) The coverage may be less or even nil. If the sensing element is exposed to strong light, such as direct sunlight, illumination, etc., or dust is deposited on it or it is used behind a curtain, etc. If the distances exceed the area indicated above, be sure to check the receiver status. Receiver (b) When manipulating the remote control mounted on a wall: Make sure that it works normally (i.e., transmission/reception signal is audible) before mounting. Remote control available in this area. - 36 - 5.7 Installation of wired remote control and super link adapter (SC-AD-ER) (Optional parts) (d) (1) Modifying the indoor unit’s printed circuit board (a) Remove the air inlet panel (Refer to the installa tion directions). (b) Remove the front panel (Refer to the installation directions). (c) Remove the control box • Remove the screw and the latch, and open the control lid. Cut the jumper attached on the board. • Remove the upper box. Remove the screw, the latch and the band. Screw Band Latch Latch • Control lid Latch Cut the jumper (printed “WIRED REMOCON”) attached on the board. It is impossible to control by the wireless remote control after cutting the jumper. Jumper (WIRED REMOCON) Screw • Remove the flap connector, the louver connector, the fan motor connector, the earth and the sensor. J1 J2 SW12 J3 J4 SW12 WIRED REMOCON J1 J2 J3 J4 WIRED REMOCON SW13 SW14 • Install the upper box. Sensor (e) Fan motor connector Earth Flap/Louver connector Screw (Fixing the control box) • • Connect the wire • Connect the wired remote control and super link wire. (Please refer to the installation manual of attachment in wired remote control for details) Band Remove the screw fixing the control box. Remove the control box from the base . It is possible to remove the control box from the base by leaning the control box slightly to right-hand side and pulling it toward you. Each wire can be connected the left or right terminal block. 1 (f) Install the control box. Be careful not to bite the wire. (g) Install the front panel. (h) Install the air inlet panel. 2 Notes (1) One remote control cannot control two or more indoor units. (2) To connect the super link, the optional SCAD-ER (super link adapter) is required. - 37 - (2) Installation of wired remote control (Optional parts) (a) Selection of installation location Avoid the following locations 1) Direct sunlight. 2) Close to heating device. 3) Highly humid or water splashing area. 4) Uneven surface. (b) Installation procedure 1) Exposed fiting a) Open the remote control case. 2) Recessed fitting a) The Electrical box and remote control (shield wire must be use in case of extension) are first embedded. Remote control cord Electrical box Not included Upper Lower case • Put a screw driver (flat-head) into the concavity made on the upper part of a remote control unit and twist it lightly to open the casing. b) The cord of a remote control unit can only be pulled out in the upward direction. Lower Cable outlet Upper Cut off with a knife or the like thin walled parts intended for screw holes, and then fix it with screws. Thin walled part Upper Lower Lower case Cable outlet b) Remove the upper case to the remote control. c) Attach the lower case to the Electricl box with two M4 screws. (Head diameter must be 8 mm). Choose either of the following two positions in fixing it with screws. d) Connect the remote cord to the remote control. Lower • Cut off with nippers or a knife a thin walled part made on the upper end of the rmote control unit’s bottom casing, and then remove burrs with a file or the like. c) Fix the remote control unit’s bottom casing onto a wall with two wood screws supplied as accessories. Upper Refer to [Exposed Fitting]. e) Installation work is completed by replacing the top casing onto the bottom casing as before. f) Set the function switch according to the type of the indoor unit. Lower case Lower d) Connect the remote control to the terminal block. Connect the terminals of the remote control to the indoor unit with the same numbers. Because the terminal block has polarity, the device becomes inoperative if there are wrong connections. Refer to [Function setting]. Terminals: xRed wire, YWhite wire, ZBlack wire Upper Two M4 screws (Head diameter must be 8mm) (not included) Upper case Board Red White Black X Y Z ▼ Lower Precation in Extending the Remote control cord Maximum total extension 600m. The cord should be a shielded wire. ● For all types : 0.3mm2 × 3 cores Note (1) Use cables up to 0.5mm2 (maximum) for those laid inside the remote control unit casing and connect to a different size cable at a vicinity point outside the remote control unit, if necessary. Wiring • Use a cord of 0.3mm2 (recommended) 0.5mm2 (maximum) for a remote control unit cord. Remove a sheathe of the remote control unit cord for the section laid within the remote control unit casing. The length of each wire that should be left after a sheath is removed is as follows: Within 100-200m………… Within 300m………… Within 400m………… Within 600m………… Length of the section where a sheath is removed 0.5 mm2 0.75 mm2 1.25 mm2 2.0 mm2 × 3 cores × 3 cores × 3 cores × 3 cores ● The shielded wire should be grounded at one side only. Earth Black: 195mm, White: 205mm, Red: 215mm e) Replace the top casing as before. f) Use a cord clamp to attach the remote control cord to the wall. g) Set the functions according to the types of indoor unit. See Section “Function Setting’’. - Indoor unit Remote control cord (Shielded wire) (This side is not grounded) Remote control switch 38 - (3) Setting functions using the wired remote control (a) The default settings of this unit's functions are as follows: If you want to charge a setting, follow the procedure found in the installation manual and set to your desired setting. For the method of setting, please refer to the installation manual of a remote control unit. 1 Remote control unit functions ( Function number A Function description B FUNCTION Setting C 2 Indoor unit functions (I/U FUNCTION ) Function number A Default setting Function description B Setting C INVALID (01) GRILLE ( Grille lift SET panel setting ) STANDARD (Mild mode) (01) 50Hz AREA ONLY Hi CEILING SET Hi CEILING 1 (Powerful mode) 60Hz AREA ONLY 02 03 04 05 06 07 08 (09) 10 INVALID 1000H→STOP 04 INVALID 13 EXTERNAL INPUT SET OPERATION PERMISSION PROHIBITED NORMAL OPERATION 06 NORMAL OPERATION (07) ROOM TEMP OFFSET (Heating room temperature offset) (08) Heating FAN CONTROL fan control VALID INVALID VALID LOUVER S/W INVALID VALID TIMER S/W INVALID ( ) SENSOR ON (Valid) VALID VENTI SET * NO DISP CHANGE ( ) (09) FREEZE PREVENT TEMP (10) FREEZE PREVENT CONTROL 3 FAN SPEED 2 FAN SPEED HEAT PUMP MODEL TYPE COOLING ONLY EXTERNAL CONTROL SET 16 ERROR DISP SET (18) ( °C/°F SET INDIVIDUAL OPERATION SAME OPERATION FOR ALL UNITS ERROR DISP NO ERROR DISP ) TEMP SHIFT +3˚C ) LOW FAN STOP→LOW FAN (Intermittent operation) * TEMP Lo FAN CONTROL OFF Notes(1) Setting marked with [嘷] are the default setting. (2) Setting marked with [*] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. (3) The SRK model cannot set the items described in ( ) in the function number A. DISP CHANGE Indoor unit I/U FAN SPEED fan speed setting VALID FAN CONTROL ON VENTI LINK SET TEMP RANGE SET PULSE INPUT TEMP Hi INVALID POWER FAILURE COMPENSATION SET 15 17 ( SENSOR OFF (Invalid) Remote control SENSOR S/W sensor setting Louver POSITION control setting ) 05 1 FAN SPEED 14 ( LEVEL INPUT INVALID FANSPEED S/W * Louver control FIX (1 OF 4) (4 positiion stop) POSITION setting IN MOTION (Free stop) VALID ON/OFF ON/OFF S/W NO VENTI LINK 12 AFTER 600H AFTER 1000H NO VENTI (11) FILTER SIGN SET VALID VALID MODE S/W * AFTER 180H (03) AUTO RUN OFF TEMP S/W Default setting NO DISPLAY AUTO RUN ON AUTO RUN SET ) FIX (1 OF 4) (4 position stop) IN MOTION (Free stop) °C °F Notes(1) Setting marked with [嘷] are the default setting. (2) Setting marked with [*] are those that are set automatically according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. POSITION” is changed, please also (3) When Item 17 : “ change Item 04 “ POSITION” setting found in “Indoor unit functions”. (4) The SRK model cannot set the items described in ( ) in the function number A. - 39 - (b) Function setting method 1) Stop the air conditioner 2) Press the SET and MODE buttons simultaneously for 3 seconds or longer. The screen display will be switched as follows: “ SELECT ITEM” “ AUTO RUN SET SET" “FUNCTION SET ” FUNCTION SET 3) Press the SET button. The unit will enter the function setting mode. The screen display will charge to “ FUNCTION ”. 4) Check which category your desired setting belongs to, “ FUNCTION 5) Press either FUNCTION (Remote control unit function)” or “I/U " (Indoor unit function). or Select either “ button. FUNCTION ” or “I/U FUNCTION FUNCTION ”. I/U FUNCTION 6) Press the SET button. When “ FUNCTION ” is selected. 1 “DATA LOADING” (blinking) “ FUNCTION” SET” (Function number: A, Function description: B) “01 GRILLE The screen display will be switched like this. 2 Press either or button. “Function number: A, Function description: B “from the list of remote control unit functions will be displayed one by one. Select a desired function. 3 Press the SET button. The screen display will be switched as follows: “ SETTING” 4 Press either or “Setting: C” (ex. “AUTO RUN ON”) button. A list of “Settings: C” will be displayed one by one. Select your desired setting. 5 Press the SET button. The selected setting is displayed * When “ AUTO RUN SET ” is selected. for 2 seconds, then followed by “SET COMPLETE” and the function setting process is completed. AUTO RUN SET Then the screen display will be swiched to “Function number: A, Function description: B,” so AUTO RUN ON if you want to continue to set another function, repeat the steps as explained above. AUTO RUN ON AUTO RUN OFF To finish the function setting pro- SET COMPLETE cess, please proceed to Step (c). - 40 - When “I/U FUNCTION ” is selected. 1 The screen display will be switched as follows: “ I/U SELECT” “ SET” “I/U No.00” (blinking) I/U No.00 2 Press either or button. Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3. If “ALL I/U ” is selected while indoor group control is in effect, you can set all units to the same settings. 3 Press the SET button. Indoor unit number indication will change from blinking to lit continuously, The screen display will be switched as follows: "DATA LOADING" (blinking for about 2 to 23 seconds) “ FUNCTION” “05 EXTERNAL INPUT SET” (Function number: A, Function description: B) * When “ EXTERNAL INPUT SET” is selected. Function number: A EXTERNAL INPUT SET 4 Press either or Function description: B button. “Function number: A, Function description: B” from the list of indoor unit functions will be displayed one by one. Select a desired function. 5 Press the SET button. The screen display will be switched as follows: “ LEVEL INPUT 6 Press either or SETTING” “Setting: C” (ex. “LEVEL INPUT”) button. A list “Setting: C” will be displayed one by one. Select your desired setting. 7 Press the SET button. The selected setting is displayed for 2 seconds, then followed by “SET COMPLETE” and the function setting process is completed. Then the screen display will be switched to “Function number: A, Function description: B” so if you want to continue to set another function, repeat the step as explained above. To finish the function setting process, please proceed to Step 8. 8 Press AIR CON No. button. The screen display will go back to the indoor unit selection screen (ex. “ I/U No.00”). (c) Press the ON/OFF button. This ends a function setting process. Even if a function setting process is not completed, this ends the process. Please note that any setting that is not completed will become void. ¡ Pressing the RESET button during a function setting process will allow you to go back the previous step. Please note that any setting that is not completed will become void. ¡ Method of checking the current setting While following the above mentioned step, the setting that appears when the SET button is pressed for each “Function number: A, Function description: B” is the current setting “Stting: C”. (When "ALL I/U the indoor unit with the lowest number is displayed) ¡ Settings are stored in the controller and not lost even a power outage occurs. - 41 - " is selected, the setting of (d) Changing the remote control’s temperature setting range 1) The temperature setting range of the remote control can be changed. Through remote control button operations, the upper limit and lower limit set temperature values can be changed individually. During heating operation, the changed upper limit value becomes valid and at times other than during heating operation, (during cooling, dehumidification, auto and fan operation), the changed lower limit value becomes valid. Range of Possible Changes Upper Limit Value: 22~30ºC (valid during heating) Lower Limit Value: 18 ~ 26ºC (valid at times other than during heating) 2) Operation a) With the remote control in the stopped state, press the SET and MODE buttons simultaneously for 3 seconds or longer. The display will changed from “ b) Press the SELECT ITEM” “ SET” button once. The display will change to TEMP RANGE “FUNCTION SET ” . c) Press the SET button to enter the temperature range setting mode. d) Using the or button, select “Hi LIMIT SET ” or “Lo LIMIT SET ,” the press the SET button. e) If “Hi LIMIT SET” is selected, 1 The display changes from “ 2 Using the “ SET UP” “Hi LIMIT 22ºC ” (flashing). ” button, select the upper limit value. Display example: “Hi LIMIT 22ºC ” (flashing) 3 Press the SET button to fix the setting. Display example: “Hi LIMIT 22ºC” (lighted up) f) If “Lo LIMIT SET” is selected, 1 The display changes from “ 2 Using the “ SET UP” “Lo LIMIT 26ºC ” (flashing). ” button, select the upper limit value. Display example: “Lo LIMIT 26ºC ” (flashing) 3 Press the SET button to fix the setting. Display example: “Lo LIMIT 26ºC” (lighted up) g) Press the ON/OFF button to end the setting procedure. (The procedure also ends if the ON/OFF button is pressed during the setting operation. However, settings which have not been fixed become invalid, so exercise caution.) • If the RESET button is pressed during a setting operation, the display returns to the previously displayed setting screen. However, settings which have not been fixed become invalid, so exercise caution. * If “NO DISP CHANGE” is selected in No. 12, “TEMP RANGE SET” of the remote control’s functions, of the function setting modes, the remote control’s display does not change even if the temperature range has been changed. (Example) If the upper limit is set at 28˚C Function No. A 12 Function Contents B Setting Contents C Control Contents DISP CHANGE The remote control’s display and sent data upper limit changes to 28°C. NO DISP CHANGE The remote control’s display upper limit remains at 30ºC and only the upper limit of the sent data is changed to 28°C. TEMP RANGE SET - 42 - (4) SUPER LINK ADAPTER (SC-AD-ER) (a) Functions 1) Transmits the settings from the Super link option to the indoor units. 2) Returns the priority indoor unit data in response to a data request from the Super link option. 3) Inspects the error status of connected indoor units and transmits the inspection codes to the Super link option. 4) A maximum of 16 units can be controlled (if in the same operation mode). (b) Wiring connection diagram Connection to super link (total length of wires: 1000 m maximum) 0.75 ~ 2.0 mm2 2-core Blue A SC-AD-ER B Red X White Y Z Master/Slave address No. 1 2 3 4 Blue Black Network address [00] ~ [47] X Y Z Name ot the recommended signal wire Shielding wire Vinylcabtire round cord Vinyl cabtire round cable Control vinyl insulated, vinyl sheath cable Connection to the terminal block for remote control (polar) (total length of wires: 600 m maximum) Master/Slave Address SW 3-1 ON Master OFF Slave Shielding wires: 100 ~ 200 m ................. ~ 300 m ................. ~ 400 m ................. ~ 600 m ................. 0.5 mm2 × 3-core wires 0.75 mm2 × 3-core wires 1.25 mm2 × 3-core wires 2.0 mm2 × 3-core wires ● Make sure to ground one side only of the shielding wire. 1) Set the super link network address with SW1 (10-position) and SW2 (1-position). 2) Without a remote control (no wired remote control and no wireless remote control), set SC-AD-ER SW3-1 to ON (Master). Basic Connections Outdoor unit Internal/external Crossing Indoor unit X Y Z SC-AD-ER X Y Z A B X Y Z Remote control X Y Z Network A B options - 43 - 6. MAINTENANCE DATA 6.1 Troubleshooting procedures for electrical equipment (1) Cautions 1 If you are disassembling and checking an air conditioner, be sure to turn off the power before beginning. When working on indoor units, let the unit sit for about 1 minute after turning off the power before you begin work. When working on an outdoor unit, there may be an electrical charge applied to the main circuit (electrolytic condenser), so begin work only after discharging this electrical charge (to DC 10 V or lower). 2 When taking out printed circuit boards, be sure to do so without exerting force on the circuit boards or package components. 3 When disconnecting and connecting connectors, take hold of the connector housing and do not pull on the lead wires. (2) Items to check before troubleshooting 1 Have you thoroughly investigated the details of the trouble which the customer is complaining about? 2 Is the air conditioner running? Is it displaying any self-diagnosis information? 3 Is a power supply with the correct voltage connected? 4 Are the control lines connecting the indoor and outdoor units wired correctly and connected securely? 5 Is the outdoor unit’s refrigerant service valve open? (3) Troubleshooting procedure (If the air conditioner does not run at all) If the air conditioner does not run at all, diagnose the trouble using the following troubleshooting procedure. If the air conditioner is running but breaks down, proceed to troubleshooting step (4). Important When all the following conditions are met, we say that the air conditioner will not run at all. 1 The Run light does not light up. 2 The flaps do not open. 3 The indoor unit fan motors do not run. 4 The self-diagnosis display does not function. Troubleshooting procedure (If the air conditioner does not run at all) Is the correct voltage connected for the power supply? NO Make sure the correct voltage is connected, then perform an operation check. * If the voltage is correct, it will be within the following voltage range. SRK52, 71CF-BN: 198 ~ 264V SRK52, 71CF-BP: 198 ~ 242V YES With the power off, do the flaps open manually, then close again when the power is turned on? NO Is the current fuse on the indoor unit’s board blown? YES NO YES Proceed to the indoor unit circuit board check. Is there a reception sound emitted from the unit when it is operated by the remote control? NO YES Replace the indoor unit’s circuit board and perform an operation check. Proceed to the wireless remote control troubleshooting procedure. - 44 - If the package components are not damaged, replace the fuse and perform an operation check again. (4) Troubleshooting procedure (If the air conditioner runs) Confirm the contents of the customer complaint. NO The cause of the trouble can be specifically identified. YES Eliminate the cause of the trouble and perform an operation check. Check the self-diagnosis display. See page 46. Identify the faulty component by using the check procedure corresponding to the content of the trouble. Replace the faulty component, then perform an operation check. Note (1) Even in cases where only intermittent stop data are generated, the air conditioning system is normal. However, if the same protective operation recurs repeatedly (3 or more times), it will lead to customer complaints. Judge the conditions in comparison with the contents of the complaints. - 45 - (5) Self-diagnosis table When this air conditioner performs an emergency stop, the reason why the emergency stop occurred is displayed by the flashing of display lights. If the air conditioner is operated using the remote control 3 minutes or more after the emergency stop, the trouble display stops and the air conditioner resumes operation. (1) Indoor unit display panel Run Timer light light ON 1 time flash 6 time flash ON Wired remote control display Description of trouble E5 Error of signal transmission E6 Heat exchanger sensor error Cause Display (flashing) condition ● Defective power supply, Broken signal wire, defective in/outdoor unit boards When there is no signal between the indoor unit’s board and outdoor unit’s board for 10 seconds or longer (when the power is turned on), or when there is no signal for 1 minute 50 seconds or longer (during operation)(the compressor is stopped). ● Broken heat exchanger sensor wire, poor connector connection When a heat exchanger sensor wire disconnection is detected while operation is stopped. (If a temperature of –20oC or lower is detected for 3 minutes, it is judged that the wire is disconnected.) (Not displayed during operation.) ● Broken room temperature sensor wire, poor connector connection When a room temperature sensor wire disconnection is detected while operation is stopped. (If a temperature of –20oC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) ● Defective fan motor, poor connector connection When conditions for turning the indoor unit’s fan motor on exist during air conditioner operation, an indoor unit fan motor speed of 300 rpm or lower is measured for 30 seconds or longer. (The air conditioner stops.) ● Gas shortage, defective discharge pipe sensor, closed service valve When the value of the discharge pipe sensor exceeds the set value. (The air conditioner stops.) 2 time flash ON E7 Room temperature sensor error 6 time flash ON E 16 Indoor fan motor error ON 5 time flash E 36 Over heat of compressor ● E 37 Outdoor heat exchanger sensor error Broken heat exchanger sensor wire, poor connector connection When a sensor wire disconnection is detected while operation is stopped. (If a temperature of –64oC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) Keeps 1 time flashing flash ● E 38 Outdoor air temperature sensor error Broken outdoor air temp. sensor wire, poor connector connection When an outdoor air temperature sensor wire disconnection is detected while operation is stopped. (If a temperature of –64oC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) Keeps 4 time flashing flash Discharge pipe sensor error ● E 39 Broken discharge pipe sensor wire, poor connector connection After the compressor has operated for 9 minutes continuously, if there is a disconnected signal for the discharge pipe temperature sensor detected -64oC for 15 seconds. 2 time flash E 59 Abnormality of outdoor unit — E1 Error of wired remote control wiring Keeps 2 time flashing flash Broken compressor wire Broken discharge pipe sensor wire, poor connector connection ● Compressor blockage ● ON — ● ● Broken wired remote control wire, defective indoor unit boards When the indoor heat exchanger temperature does not fall to 25oC or below for 40 minutes after 5 minutes have elapsed since the compressor operation start. The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor control PCB is faulty. (The communications circuit is faulty.) Notes (1) The air conditioner cannot be restarted using the remote control for 3 minutes after operation stops. (2) The wired remote control is optional parts. - 46 - (6) Inspection procedures corresponding to detail of trouble [Broken sensor wire, connector poor connection] Sensor error Is connector connection good? NO Correct connection. YES NO Is sensor resistance value good? Replace sensor. YES Replace PCB. ◆ Sensor temperature characteristics (Discharge pipe temp., outdoor unit heat exchanger temp.) ◆ Sensor temperature characteristics (Room temp., indoor unit heat exchanger temp., outdoor air temp.) Temperature (˚C) Resistance (kΩ) Temperature (˚C) Resistance (kΩ) 0 164 70 8.7 127 75 7.3 99 80 6.2 15 78 85 5.3 20 62 90 4.5 25 50 95 3.9 30 40 100 3.3 35 32 105 2.9 40 26 110 2.5 45 21 115 2.2 50 17 120 1.9 55 14 125 1.6 60 12 130 1.4 65 10 135 1.3 25 Resistance (kΩ) 5 10 30 (Broken wire) 20 15 10 5 (Shortcircuit) –10 0 20 30 40 50 60 70 Temperature (˚C) [Defective fan motor, connector poor connection, defective PCB] Indoor fan motor error Is connector connection good? 10 NO Correct connector connection YES * Disconnect the fan motor connector, then investigate the DC fan motor and indoor unit circuit board separately. Is the output of the indoor unit’s printed circuit board normal? Is DC fan motor resistance value good? NO YES Replace indoor fan motor NO Notes (1) See pages 50 for the DC fan motor and indoor unit circuit board check procedure. (2) After making sure the DC fan motor and indoor unit circuit board are normal, connect the connectors and confirm that the fan motor is turning. (If power is turned on while one or the other is broken down, it could cause the other to break down also.) YES Replace indoor PCB Normal - 47 - [Gas shortage, defective discharge pipe sensor] Over heat of compressor Is discharge pipe sensor resistance value good? NO (page 47) Connector connection check, resistance value check, replacement of discharge pipe sensor YES Is sufficient quantity of refrigerant circulated? NO Does trouble persist after charging gas? NO Check if there are any places where gas is leaking. YES YES Clogged capillary tube or strainer, defective EEV, etc. Defective outdoor unit PCB [Wiring error including power cable, defective indoor/ outdoor unit PCB] Error of signal transmission NO Does error persist after power reset? Trouble by transient cause, not unit trouble. YES NO Are the lines connecting the indoor and outdoor units connected normally? Correct improper wire connection on indoor/ outdoor unit. YES Is DC 0~Approx. 12V detected between 2~3 terminals on indoor unit terminal block? NO Defective indoor unit PCB YES Is DC 0~Approx. 12V detected between2~3 terminals on outdoor unit terminal block? NO Check crossover wires. YES Is AC 220/240V (BP type: AC 220V) applied between 1~2 on the outdoor side terminal block? NO Defective indoor unit PCB. Check crossover wires. YES Defective outdoor unit PCB - 48 - [Compressor malfunction of insufficient gas (refrigerant)] Abnormality of outdoor unit NO Does compressor operation? Is capacitor for compressor normal? NO Replace capacitor for compressor. YES Is connector for compressor connection good? NO Correct connection YES YES Replace compressor. NO Is heat exchanger sensor resistance value good? Replace heat exchanger sensor YES NO Is refrigerant amount normal? Does trouble persist after charging gas? YES NO Check if there are any places where gas is leaking YES Clogged capillary tube or strainer, defective EEV, etc. Insufficient gas (7) Phenomenon observed after shortcircuit, wire breakage on sensor. (a) Indoor unit Phenomenon Sensor Operation mode Room temperature sensor Cooling Release of continuous compressor operation command Continuous compressor operation command is not released. Heat exchanger sensor Cooling Compressor stop. (Abnormality of outdoor unit) Continuous compressor operation command is not released. (Anti-frosting) Humidity Sensor Cooling 1 in the table below. 1 in the table below. Shortcircuit Broken wire 1 Humidity sensor operation Short Disconnected wire Circuit Failure mode 1 Disconnected wire Control input circuit reading Air conditioning system operation Humidity reading is 0% Operates in the Dry region 2 Disconnected wire Humidity reading is 0% Operates in the Dry region 12 Disconnected wire Humidity reading is 0% Operates in the Dry region 1 and 2 are short circuited Humidity reading is 100% Operates in the Cooling region. Humidity sensor element Connector (CnF) Remark: Do not perform a continuity check of the humidity sensor with a tester. If DC current is applied, it could damage the sensor. Humidity sensor assembly (b) Outdoor unit Phenomenon Sensor Operation mode Heat exchanger sensor Cooling High pressure control. System can be operated normally. Outdoor air temperature sensor Cooling System can be operated normally. System can be operated normally. Discharge pipe sensor Cooling Compressor overload protection is disabled. (Can be operated.) Compressor stop Shortcircuit - Broken wire 49 - Checking the indoor electrical equipment (a) Indoor unit circuit board check procedure 1) Press the unit’s ON/OFF button for 5 seconds or longer (a beep which indicates receiving will be emitted). Then check the following items. 1 The indoor unit’s fan motor runs. 2 The run light lights up. 2) There should be voltage [AC 220-240 V (BP type: AC 220V)] between terminals 1 and 2 on the terminal block. With the analog tester set in the DC 30 V range, if the voltage at 2 (+) and 3 (-) is measured, the needle oscillates at about 12V. 3) It is possible to run and stop the unit using the remote control. If operation is as described above, the indoor unit’s board is normal. Note (1) Check the voltage on the terminal block. ¡ Power supply : Between 1-2 [AC 220-240 V (BP type: AC 220V)] ¡ Signal : Between 2-3 (Changing between DC 0-Approx. 12V) (b) Indoor unit fan motor check procedure This is a diagnostic procedure for determining if the indoor unit’s fan motor or the circuit board is broken down. 1) Indoor unit printed circuit board output check a) Turn off the power. b) Remove the front panel, then disconnect the fan motor lead wire connector. c) Turn on the power. If the unit operates when the ON/OFF button is pressed, if trouble is detected after the voltages in the following figure are output for approximately 30 seconds, it means that the circuit board is normal and the fan motor is broken down. If the voltages in the following figure are not output at connector pins No. 1, 4 and 5, the indoor unit’s circuit board has failed and the fan motor is normal. (–) GND DC several V (4~6 V) BN type: DC 308~336V BP type: DC 308V 5 4 3 2 1 6 5 4 3 2 1 Black Indoor unit circuit board Red 6 White CNU Yellow DC15V Blue (8) FMI 2) DC Fan motor resistance check Measuring Point 1 – 3 (Red – Black) Resistance when Normal 4 – 3 (White – Black) 30 kΩ or higher 25 MΩ or higher - Notes (1) Remove the fan motor and measure it without power connected to it. Notes (2) If the measured value is below the value when the motor is normal, it means that the fan motor is faulty. 50 - (9) How to make sure of remote control (1) Is remote control normal? NO Remote control defects YES Replace the display. Again pushing operating switch Is the unit operable with remote control? Operating the unit? YES Abnormality is not found. Normal NO Defective remote control NO Does unit ON/OFF button operates? Operating the unit. YES Note (1) Check method of remote control (a) Press the reset switch of the remote control. (b) If all LCD are displayed after one (1) display, it is basically normal. YES NO Control problem on main unit - 51 - 6.2 Servicing (1) Evacuation The evacuation is an procedure to purge impurities......noncondensable gas, air, moisture from the refrigerant equipment by using a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant equipment will freeze, causing what is called water clogging. ¡ Evacuation procedure (a) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it should be relieved through the check joint. (b) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping. (c) Connect a vacuum pump to the charge hose A . Repeat evacuation in the following sequence. Liquid side Start the vacuum pump. Compound pressure gauge indicates – 0.1 MPa (–76 cmHg) Gas side Operate the vacuum pump for more than 15 minutes after – 0.1 MPa (–76 cmHg) is indicated. Check joint Close low pressure valve 1 of gauge manifold. Service hose Gauge manifold Stop the vacuum pump. Charge hose Refrigerant cylinder Notes (1) Do not use the refrigerant pressure to expel air. (2) Do not use the compressor for evacuation. (3) Do not operate the compressor in the vacuum condition. (2) Vacuum pump Refrigerant charge (a) Discharge refrigerant entirely from the unit and evacuate the unit. Note: Addition of refrigerant without evacuation is unreasonable, because it will result in low charge or overcharge. (b) Keep the gauge manifold and connect a refrigerant cylinder to the unit. (c) Record the weight of the refrigerant cylinder on the balance. This is necessary for making sure of the charged refrigerant amount. (d) Purge air from the charge hose A Firstly loose the connecting portion of the charge hose A at the gauge manihold side and open the valve 3 for a few seconds, and then immediately retighten it after observing that gas is blow out from the loosened portion. (e) Open the valve 1 and 3 after discharging air from the charge hose A , then the gas refrigerant begins flowing from the cylinder into the unit. Be sure to erect the refrigerant cylinder upright to let gas refrigerant flow into the unit. (f) When refrigerant has been charged into the system to some extent, refrigerant flow becomes stagnant, when that happens, start the compressor in cooling cycle until the unit is filled with refrigerant to the specified weight. (g) Making sure of the refrigerant amount, close the valve 3 (h) Disconnect the charge hose from the unit. Cover the valve ports of the refrigerant piping with caps and tighten them securely. (i) Check for gas leakage applying a gas leak detector along the piping line. (j) Start the air conditioner and make sure of its operating condition......high side and low side pressures and temperature difference between return air and supply air. - 52 - WALL MOUNTED TYPE ROOM AIR-CONDITIONER Air-Conditioning & Refrigeration Systems Headquarters 16-5, 2-chome, Kounan, Minato-ku, Tokyo, 108-8215, Japan Fax : (03) 6716-5926 - 2- No.034(1.1A) RO